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The crash, near the intersection with Fairfield Street, sent two others to area hospitals with non-life-threatening injuries. Police said one car hit another vehicle in the intersection, rolled over and fatally struck two pedestrians.

John "Jack" Lanzillotti, 28, of Brookline, was pronounced dead at the scene, police said. Jessica Campbell, 27, of Brookline, was transported to Brigham and Women's Hospital, where she died of her injuries.

Grieving family members in Lanzillotti's hometown of Shrewsbury said the couple had been together two years and recently moved in together.

Lanzillotti was a video producer with the Boston Red Sox who produced the "video and scoreboard entertainment" daily at Fenway Park, the team said.

"We know how broken-hearted we feel, and we can't imagine how his family feels, how Jessica's family feels," said Lanzillotti's supervisor Charles Steinberg.

“Jack has been an important, respected, and beloved member of our organization for the past seven years,” said Red Sox President/CEO Larry Lucchino. “His poise under pressure and good-humored manner helped us deliver consistently outstanding results. We are all grief-stricken, and we send our deepest sympathies and condolences to Jack’s and Jessica’s families.”

Witnesses told NewsCenter 5 that a black car ran a red light and flipped into a parked Mini Cooper after it was hit by a third car.

"I saw one person get out of the flipped car," said witness Karen Pevenstein.

The cause of the crash, which took place just after 9 p.m., is under investigation by Boston police.